I can only state what Oly told me on the phone about the H serial numbers being sequential meaning the lower was made before the H1300 at 8-27-94 as per Oly... There are more numbers out there that aren't on the list also including one I bought new in 93'...Thanks...

Their are a few H0 are Hzero out thier that are Pre ban rifle lowers and Pre Ban Pistol Lowers. And they are very old, I am talking made in the early 80s...... I seen one today at the gun show in houston..... and found one of the TBOR lowers that was made on 91........
Need to check if it is a Pistol lower....